# Contributor: Modelmat <modelmat@outlook.com.au>
# Maintainer: Modelmat <modelmat@outlook.com.au>
# Comaintainer: gilcu3 <gilcu3 [at] gmail [dot] com>

# Usage:
#  This package provides a configuration file in /etc/psiphon.conf
#  as well as systemd user service, `psiphon.service`. The service
#  will crash (probably a bug) as the `DataStoreDirectory` option
#  is empty.
#
#  However, if it is not set it will store temporary files in the
#  current working directory, which will fail for a user-service
#  (does not have write permissions for its directory). Hence, it
#  it advised that you set it to a writeable directory.
#
#  If it is necessary to have per-user configuration files, it is
#  advised to create them in `~/.config/systemd/user/` to override
#  the system-wide user service. 
#
#  This application also installs `/usr/bin/psiphon-tunnel-core`.

_pkgname=psiphon-tunnel-core
pkgname="$_pkgname-git"
pkgver=2.0.20.r3554.9efdd083
pkgrel=1
epoch=2
pkgdesc='Psiphon Tunnelling Proxy'
arch=($CARCH)
url="https://github.com/Psiphon-Labs/psiphon-tunnel-core"
license=('GPL3')
makedepends=('go-pie' 'perl' 'git')
depends=('glibc')
source=("git+$url.git"
        "psiphon.conf"
        "psiphon.service")
backup=('etc/psiphon.conf' 'usr/lib/systemd/user/psiphon.service')
sha256sums=('SKIP'
         'c2c414831ad29bdeecd00313c473fbaa448f4750e70df1c10e863870bde179aa'
         'd0227e69cac62480951e9c83747d43fccd7bdd18224652428ab20369b84173aa')

pkgver() {
  cd $_pkgname
  TAG=$(git describe --tags $(git rev-list --tags --max-count=1) | sed 's/^v//')
  COMMIT=$(git rev-parse --short HEAD)
  REVISION=$(git rev-list --count HEAD)
  printf "%s.r%s.%s" "$TAG" "$REVISION" "$COMMIT"
}

build() {
  cd "$_pkgname/ConsoleClient"
  
  
  # Copied from the README file
  EXE_BASENAME="psiphon-tunnel-core"
  BUILDINFOFILE="${EXE_BASENAME}_buildinfo.txt"
  BUILDDATE=$(date --iso-8601=seconds)
  BUILDREPO=$(git config --get remote.origin.url)
  BUILDREV=$(git rev-parse --short HEAD)
  GOVERSION=$(go version | perl -ne '/go version (.*?) / && print $1')
  DEPENDENCIES=$(echo -n "{" && GOOS=$1 go list -tags "${BUILD_TAGS}" -f '{{range $dep := .Deps}}{{printf "%s\n" $dep}}{{end}}' | GOOS=$1 xargs go list -tags "${BUILD_TAGS}" -f '{{if not .Standard}}{{.ImportPath}}{{end}}' | xargs -I pkg bash -c 'cd $GOPATH/src/$0 && if echo -n "$0" | grep -vEq "^github.com/Psiphon-Labs/psiphon-tunnel-core/" ; then echo -n "\"$0\":\"$(git rev-parse --short HEAD)\"," ; fi' pkg | sed 's/,$//' | tr -d '\n' && echo -n "}")
  

  PKG_LDFLAGS="\
-X github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/buildinfo.buildDate=$BUILDDATE \
-X github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/buildinfo.buildRepo=$BUILDREPO \
-X github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/buildinfo.buildRev=$BUILDREV \
-X github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/buildinfo.goVersion=$GOVERSION \
-X github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/buildinfo.dependencies=$DEPENDENCIES \
-s -w
"
  export CGO_CPPFLAGS="${CPPFLAGS}"
  export CGO_CFLAGS="${CFLAGS}"
  export CGO_CXXFLAGS="${CXXFLAGS}"
  export CGO_LDFLAGS="${LDFLAGS}"

  echo -e "${BUILDDATE}\n${BUILDREPO}\n${BUILDREV}\n" > $BUILDINFOFILE

  if [ ! -d bin ]; then
    mkdir bin
  fi
  
  GOOS=linux GOARCH=amd64 go build -v -x -buildmode=pie -trimpath -ldflags "-linkmode external ${PKG_LDFLAGS}" -tags "${BUILD_TAGS}" -o $_pkgname
  RETVAL=$?
  if [ $RETVAL != 0 ]; then
    echo "....gox failed, exiting"
    exit $RETVAL
  fi
  unset RETVAL

  # TODO: Figure out how to do the stripping?
  # https://wiki.archlinux.org/index.php/Go_package_guidelines#Flags_and_build_options

}

package() {
  cd $_pkgname/ConsoleClient/
  install -Dm755 $_pkgname "$pkgdir/usr/bin/$_pkgname"
  install -Dm644 "$srcdir/psiphon.conf" "$pkgdir/etc/psiphon.conf"
  install -Dm644 "$srcdir/psiphon.service" "$pkgdir/usr/lib/systemd/user/psiphon.service"
}